Arrange three 1s, three 2s and three 3s in this square so that
every row, column and diagonal adds to the same total.
Complete the magic square using the numbers 1 to 25 once each. Each
row, column and diagonal adds up to 65.
There are seven pots of plants in a greenhouse. They have lost their labels. Perhaps you can help re-label them.
A group activity using visualisation of squares and triangles.
Hover your mouse over the counters to see which ones will be
removed. Click to remover them. The winner is the last one to
remove a counter. How you can make sure you win?
You have pitched your tent (the red triangle) on an island. Can you
move it to the position shown by the purple triangle making sure
you obey the rules?
Systematically explore the range of symmetric designs that can be
created by shading parts of the motif below. Use normal square
lattice paper to record your results.
Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten
numbers from the bags above so that their total is 37.